/*
 * textillate.js
 * http://jschr.github.com/textillate
 * MIT licensed
 *
 * Copyright (C) 2012-2013 Jordan Schroter
 */

(function ($) {
    "use strict";

    function isInEffect (effect) {
        return /In/.test(effect) || $.inArray(effect, $.fn.textillate.defaults.inEffects) >= 0;
    };

    function isOutEffect (effect) {
        return /Out/.test(effect) || $.inArray(effect, $.fn.textillate.defaults.outEffects) >= 0;
    };

    // custom get data api method
    function getData (node) {
        var attrs = node.attributes || []
            , data = {};

        if (!attrs.length) return data;

        $.each(attrs, function (i, attr) {
            if (/^data-in-*/.test(attr.nodeName)) {
                data.in = data.in || {};
                data.in[attr.nodeName.replace(/data-in-/, '')] = attr.nodeValue;
            } else if (/^data-out-*/.test(attr.nodeName)) {
                data.out = data.out || {};
                data.out[attr.nodeName.replace(/data-out-/, '')] = attr.nodeValue;
            } else if (/^data-*/.test(attr.nodeName)) {
                data[attr.nodeName] = attr.nodeValue;
            }
        })

        return data;
    }

    function shuffle (o) {
        for (var j, x, i = o.length; i; j = parseInt(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
        return o;
    }

    function animate ($c, effect, cb) {
        $c.addClass('animated ' + effect)
            .css('visibility', 'visible')
            .show();

        $c.one('animationend webkitAnimationEnd oAnimationEnd', function () {
            $c.removeClass('animated ' + effect);
            cb && cb();
        });
    }

    function animateChars ($chars, options, cb) {
        var that = this
            , count = $chars.length;

        if (!count) {
            cb && cb();
            return;
        }

        if (options.shuffle) $chars = shuffle($chars);
        if (options.reverse) $chars = $chars.toArray().reverse();

        $.each($chars, function (i, c) {
            var $char = $(c);

            function complete () {
                if (isInEffect(options.effect)) {
                    $char.css('visibility', 'visible');
                } else if (isOutEffect(options.effect)) {
                    $char.css('visibility', 'hidden');
                }
                count -= 1;
                if (!count && cb) cb();
            }

            var delay = options.sync ? options.delay : options.delay * i * options.delayScale;

            $char.text() ?
                setTimeout(function () { animate($char, options.effect, complete) }, delay) :
                complete();
        });
    };

    var Textillate = function (element, options) {
        var base = this
            , $element = $(element);

        base.init = function () {
            base.$texts = $element.find(options.selector);

            if (!base.$texts.length) {
                base.$texts = $('<ul class="texts"><li>' + $element.html() + '</li></ul>');
                $element.html(base.$texts);
            }

            base.$texts.hide();

            base.$current = $('<span>')
                .text(base.$texts.find(':first-child').html())
                .prependTo($element);

            if (isInEffect(options.in.effect)) {
                base.$current.css('visibility', 'hidden');
            } else if (isOutEffect(options.out.effect)) {
                base.$current.css('visibility', 'visible');
            }

            base.setOptions(options);

            base.timeoutRun = null;

            setTimeout(function () {
                base.options.autoStart && base.start();
            }, base.options.initialDelay)
        };

        base.setOptions = function (options) {
            base.options = options;
        };

        base.triggerEvent = function (name) {
            var e = $.Event(name + '.tlt');
            $element.trigger(e, base);
            return e;
        };

        base.in = function (index, cb) {
            index = index || 0;

            var $elem = base.$texts.find(':nth-child(' + (index + 1) + ')')
                , options = $.extend({}, base.options, getData($elem))
                , $chars;

            $elem.addClass('current');

            base.triggerEvent('inAnimationBegin');

            base.$current
                .text($elem.html())
                .lettering('words');

            base.$current.find('[class^="word"]')
                .css({
                    'display': 'inline-block',
                    // fix for poor ios performance
                    '-webkit-transform': 'translate3d(0,0,0)',
                    '-moz-transform': 'translate3d(0,0,0)',
                    '-o-transform': 'translate3d(0,0,0)',
                    'transform': 'translate3d(0,0,0)'
                })
                .each(function () { $(this).lettering() });

            $chars = base.$current
                .find('[class^="char"]')
                .css('display', 'inline-block');

            if (isInEffect(options.in.effect)) {
                $chars.css('visibility', 'hidden');
            } else if (isOutEffect(options.in.effect)) {
                $chars.css('visibility', 'visible');
            }

            base.currentIndex = index;

            animateChars($chars, options.in, function () {
                base.triggerEvent('inAnimationEnd');
                if (options.in.callback) options.in.callback();
                if (cb) cb(base);
            });
        };

        base.out = function (cb) {
            var $elem = base.$texts.find(':nth-child(' + (base.currentIndex + 1) + ')')
                , $chars = base.$current.find('[class^="char"]')
                , options = $.extend({}, base.options, getData($elem));

            base.triggerEvent('outAnimationBegin');

            animateChars($chars, options.out, function () {
                $elem.removeClass('current');
                base.triggerEvent('outAnimationEnd');
                if (options.out.callback) options.out.callback();
                if (cb) cb(base);
            });
        };

        base.start = function (index) {
            base.triggerEvent('start');

            (function run (index) {
                base.in(index, function () {
                    var length = base.$texts.children().length;

                    index += 1;

                    if (!base.options.loop && index >= length) {
                        if (base.options.callback) base.options.callback();
                        base.triggerEvent('end');
                    } else {
                        index = index % length;

                        base.timeoutRun = setTimeout(function () {
                            base.out(function () {
                                run(index)
                            });
                        }, base.options.minDisplayTime);
                    }
                });
            }(index || 0));
        };

        base.stop = function () {
            if (base.timeoutRun) {
                clearInterval(base.timeoutRun);
                base.timeoutRun = null;
            }
        };

        base.init();
    }

    $.fn.textillate = function (settings, args) {
        return this.each(function () {
            var $this = $(this)
                , data = $this.data('textillate')
                , options = $.extend(true, {}, $.fn.textillate.defaults, getData(this), typeof settings == 'object' && settings);

            if (!data) {
                $this.data('textillate', (data = new Textillate(this, options)));
            } else if (typeof settings == 'string') {
                data[settings].apply(data, [].concat(args));
            } else {
                data.setOptions.call(data, options);
            }
        })
    };

    $.fn.textillate.defaults = {
        selector: '.texts',
        loop: false,
        minDisplayTime: 2000,
        initialDelay: 0,
        in: {
            effect: 'fadeInLeftBig',
            delayScale: 1.5,
            delay: 50,
            sync: false,
            reverse: false,
            shuffle: false,
            callback: function () {}
        },
        out: {
            effect: 'hinge',
            delayScale: 1.5,
            delay: 50,
            sync: false,
            reverse: false,
            shuffle: false,
            callback: function () {}
        },
        autoStart: true,
        inEffects: [],
        outEffects: [ 'hinge' ],
        callback: function () {}
    };

}(jQuery));
